AutoCodes – GMC – B052B GMC

B052B GMC Code - Assist Step Position Sensor Supply Circuit

Quick Answer

The Assist Step Control (ASC) Module controls the running board actuators to extend or retract the running boards. Common causes include Faulty Left Side Assist Step Motor, Left Side Assist Step Motor harness is open or shorted, Left Side Assist Step Motor circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B052B GMC indicates Assist Step Position Sensor Supply Circuit.
Common causes: Common causes include Faulty Left Side Assist Step Motor, Left Side Assist Step Motor harness is open or shorted, Left Side Assist Step Motor circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 324

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B052B GMC Description

The Assist Step Control (ASC) Module controls the running board actuators to extend or retract the running boards. Each actuator consists of an electric motor and a hall-effect switch. The module supplies a low reference and 10 V reference source voltage to the hall-effect switch. The assist step control module monitors the signal from the hall effect switch on the signal circuit. When the actuator shaft rotates, the hall-effect switch provides pulses to the assist step control module which uses the pulses as counts to determine the location of the assist steps. The assist step control module supplies the actuator motor with a 12 V control circuit and a ground control circuit. The assist step control module controls the direction of the actuator by changing the polarity of the control circuits.

OBDII Code B052B GMC - Assist Step Position Sensor Supply Circuit - AutoCodes.com — B052B GMC Code - Assist Step Position Sensor Supply Circuit

What does this mean?

What are the Possible Causes of the DTC B052B GMC?

Faulty Left Side Assist Step Motor
Left Side Assist Step Motor harness is open or shorted
Left Side Assist Step Motor circuit poor electrical connection
Faulty Assist Step Control (ASC) Module

How to Fix the DTC B052B GMC?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B052B GMC code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B052B GMC code?

Need more information on how to fix the B052B GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B052B GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

B052B 2014 GMC Sierra — Assist Step Position Sensor Supply Circuit
B052B 2015 GMC Sierra — Assist Step Position Sensor Supply Circuit
B052B 2016 GMC Sierra — Assist Step Position Sensor Supply Circuit
B052B 2017 GMC Sierra — Assist Step Position Sensor Supply Circuit
B052B 2018 GMC Sierra — Assist Step Position Sensor Supply Circuit

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B052B GMC Code

1. What does the OBDII code B052B mean on a GMC?

The B052B code indicates an issue with the Assist Step Position Sensor Supply Circuit, which monitors the position and movement of the motorized assist steps.

2. What are the symptoms of code B052B in a GMC vehicle?

Common symptoms include motorized assist steps not deploying or retracting properly, step movement being stuck or erratic, and possible warning messages on the dashboard.

3. What causes the B052B code to appear?

The code can be caused by faulty wiring or connectors in the assist step circuit, a malfunctioning position sensor, or issues with the control module for the assist step system.

4. How do you diagnose a B052B code on a GMC?

Diagnosis involves checking the wiring and connectors for damage or corrosion, testing the position sensor for proper operation, and using a scan tool to monitor live data from the assist step system.

5. Can I continue driving with the B052B code active?

Yes, you can still drive the vehicle, but the assist steps may not function correctly, potentially making it harder to enter or exit the vehicle.

6. How do you fix the B052B code on a GMC vehicle?

Repairs may include repairing or replacing damaged wiring, cleaning or replacing corroded connectors, or replacing a faulty assist step position sensor.

7. How much does it cost to repair a B052B code on a GMC?

Repair costs vary depending on the exact issue but typically range from $100 to $300 for wiring repairs or sensor replacement.

8. Can a software update fix the B052B code?

In rare cases, a software update for the assist step control module may resolve the issue if itâ€™s related to incorrect calibration or a system glitch.

9. What tools are needed to troubleshoot the B052B code?

A multimeter, a scan tool with live data capability, and basic hand tools are commonly used to diagnose and repair this issue.

10. What happens if the B052B code is ignored?

Ignoring the code may result in continued malfunction of the assist steps, potentially leading to inconvenience or further damage to the system over time.